Q: How does the Oberth Effect work, and where does the extra energy come from?  Why is it better for a rocket to fire at the lowest point in its orbit? | Ask a Mathematician / Ask a Physicist

Physicist: When a rocket fires it increases its speed by some fixed amount called the “ΔV” (delta V). If the original speed is W, and the rocket speeds up by ΔV, then the change in ene…

Gravity is such a constant it's easy to forget how much it shapes our experience. Randall Munroe, creator of the webcomic XKCD took this as a challenge. With a straightforward illustration, he compares the relative “depth” of various solar system gravity wells. Each well is drawn in such a way that it represents the relative amount of energy it would take to escape from that planet or celestial body's gravitational pull.

Gravity Wells infographic, courtesy of Randall Munroe's brilliant science webcomic XKCD.

The Oberth Effect  - Kerbal Science (KSP)

This episode demonstrates and explains 'The Oberth Effect' and the extra efficiencies you can gain from doing some of your burns at the highest possible velo.

Delta-v budget - Wikipedia, the free encyclopedia - Delta-v needed for various orbital manoeuvers using conventional rockets.[7] See:[10][11] Red arrows show where optional aerobraking can be performed in that particular direction, black numbers give delta-v in km/s that apply in either direction. Lower-delta-v transfers than shown can often be achieved, but involve rare transfer windows or take significantly longer, see: fuzzy orbital transfers. Electric propulsion vehicles going from Mars…

A diagram showing the stair-step energy needed to travel to places beyond the Earth. Delta-V is the velocity in km/sec to reach a destination. The Delta-Vs a accumulative. (Credit: Wikipedia, Delta-V)

18 Everyday Things Made Awesome Under A Microscope.

18 Everyday Things Made Awesome Under A Microscope.

18 Everyday Things Made Awesome Under A Microscope. <<< Everyday things made gross under a microscope

awesome Trust Me, I’m An Engineer by http://dezdemonhumoraddiction.space/engineering-humor/trust-me-im-an-engineer/

Trust Me, I’m An Engineer

The water hose bottle thing is real it conserves water and spreads it out evenly especially when watering plants

I Didn't Know That: How Rockets Work

Understanding how rockets work is not exactly "rocket science." Richard Ambrose and Jonny Phillips demonstrate how basic physics is responsible for launching space shuttles and fireworks up into the air.

The more I deal with creationists the more I become convinced they simply have a script prepared and they ask questions on this script with the expectation they won't or can't be answered on the grounds that their interpretation of their preferred holy book can't be wrong. It would explain why they become defensive and start projecting their own failings and attitudes onto their opponents when those questions are answered.

Love the image, and the text is such a great example of how to properly conduct an informal debate.

I understood nothing  omg no I don’t know which is worse math or Mexican music

So, March every year is Pi day. As in π not pie the delicious yummy treat. So, all the math geeks get their own day! But, March in the year 2015 will be super uber cool.

Custom Fire Pits | http://handmadness.com/2016/08/30/custom-fire-pits-2/

Grandpa Welds a Death Star Fire Pit for Christmas That’s no moon… it’s a fire pit. This is awesome.

A guide to the Solar System with all its planets and moons distilled into a handy chart to get you from Luna to Pandora without delay. 5x7 postcard. Make this into a Poster!

Solar System Subway Postcard

A guide to the Solar System with all its planets and moons distilled into a handy chart to get you from Luna to Pandora without delay.

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